This is a 4 by 2 unit Gridifinity for the “SUPVAN” bluetooth label maker available on Amazon.

https://www.amazon.com/dp/B09JQTC1SH?ref=cm_sw_r_cso_cp_apan_dp_J90CVEXPMGZ8KFRXRZS1_1&ref_=cm_sw_r_cso_cp_apan_dp_J90CVEXPMGZ8KFRXRZS1_1&social_share=cm_sw_r_cso_cp_apan_dp_J90CVEXPMGZ8KFRXRZS1_1&th=1 

This is my first attempt at a custom Gridfinity bin and I think it turned out pretty good.